Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

Klompmaker, Adiël A.; Portell, Roger W.; Frick, Michael G.

doi:10.1111/pala.12314

Cited by 59 publications

(44 citation statements)

References 126 publications

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“…The body fossil record of epicarideans is nearly non-existent. No adults have been found in decapod body chambers thus far due to their low preservation potential, as also shown experimentally (Klompmaker et al 2017; Fig. 2).…”

Section: Isopod Swellings In Decapod Crustaceanssupporting

confidence: 73%

Crustaceans as hosts of parasites throughout the Phanerozoic

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et al. 2018

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26The fossil record of crustaceans as hosts of parasites has yielded three confirmed associations: epicaridean 27 isopod-induced swellings on Jurassic-Recent decapod crustaceans, feminization of Cretaceous and 28Miocene male crabs possibly caused by rhizocephalan barnacles, and presumed pentastomids on/in 29 Silurian ostracods. Cestode platyhelminth hooks and swellings by entoniscid isopods may be recognized 30in the future. Relative to 2014, we report an increase of 41% to 124 fossil decapod species with 31 epicaridean-induced swellings in the branchial chamber (ichnotaxon Kanthyloma crusta). Furthermore, 32using a Late Jurassic (Tithonian) decapod assemblage from Austria, we find (1) no correlation between 33 genus abundance and prevalence of K. crusta, (2) host preference for some galatheoid taxa (as for a mid-34Cretaceous assemblage from Spain), and (3) a larger median size of parasitized versus non-parasitized 35 specimens for two selected species. The latter result may be caused by infestation throughout ontogeny 36 rather than exclusively in juveniles and/or possible selection for the larger sex. 37 38

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Section: Isopod Swellings In Decapod Crustaceanssupporting

confidence: 73%

Crustaceans as hosts of parasites throughout the Phanerozoic

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et al. 2018

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“…Although preservation of crab eyes has been considered unusual (Klompmaker et al, 2017), we 685! show that this is untrue.…”

Section: Eye Preservation In Other Fossil Crabsmentioning

confidence: 91%

Evolution of crab eye structures and the utility of ommatidia morphology in resolving phylogeny

Luque

Allison

Bracken‐Grissom

et al. 2019

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Image-forming compound eyes are such a valuable adaptation that similar visual systems have 20! evolved independently across crustaceans. But if different compound eye types have evolved independently multiple times, how useful are eye structures and ommatidia morphology for resolving phylogenetic relationships? Crabs are ideal study organisms to explore these questions because they have a good fossil record extending back into the Jurassic, they possess a great variety of optical designs, and details of eye form can be compared between extant and 25! fossil groups. True crabs, or Brachyura, have been traditionally divided into two groups based on the position of the sexual openings in males and females: the so-called 'Podotremata' (females bearing their sexual openings on the legs), and the Eubrachyura, or 'higher' true crabs (females bearing their sexual openings on the thorax). Although Eubrachyura appears to be monophyletic, the monophyly of podotreme crabs remains controversial and therefore requires 30! exploration of new character systems. The earliest podotremous lineages share the plesiomorphic condition of 'mirror' reflecting superposition eyes with most shrimp, lobsters, and anomurans (false crabs and allies). The optical mechanisms of fossil and extant podotreme groups more closely related to Eubrachyura, however, are still poorly investigated. To better judge the phylogenetic utility of compound eye form, we investigated the distribution of eye 35! types in fossil and extant podotreme crabs. Our findings suggest the plesiomorphic 'mirror'eyes-seen in most decapod crustaceans including the earliest true crabs-has been lost in several 'higher' podotremes and in eubrachyurans. We conclude that the secondary retention of larval apposition eyes has existed in eubrachyurans and some podotremes since at least the Early Cretaceous, and that the distribution of eye types among true crabs supports a 40! paraphyletic podotreme grade, as suggested by recent molecular and morphological phylogenetic studies. We also review photoreceptor structure and visual pigment evolution, currently known in crabs exclusively from eubrachyuran representatives. These topics are critical for future expansion of research on podotremes to deeply investigate the homology of eye types across crabs. 45!

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“…The absence of further connection of the brachyuran remains (e.g. with manus/carpus) or other body parts than dactyli and/or propodi is poorly informative on transport/exposure time experienced by claws given the admitted proclivity of decapod crustaceans' chelae to preserve the best after years (see 90,91 for 340 brachyurans).…”

Section: Iii3 Taphonomy Of the Assemblagementioning

confidence: 99%

The oldest freshwater crabs: claws on dinosaur bones

Robin

Bakel

Hyžný

et al. 2019

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35With approximately 1,500 extant species, freshwater crabs (Decapoda: Brachyura) are among the most diverse decapod crustaceans. Nevertheless, their fossil record is extremely limited:only Potamidae, Potamonautidae and Trichodactylidae are reported up to the Eocene of the Neotropics so far. This work documents unusually large decapod claws from the Upper 40 Cretaceous (Campanian) continental deposits of Velaux and vicinity (southern France), in close association with large vertebrate remains. In addition to (1) the systematic assignment of these claws, the study addresses (2) the salinity trends in the deposit environment from its faunal assemblage and the elementary chemical patterns of fossils, and (3) the likely scenario for their auto/allochtony in the Velaux fluvial system. These claws belong to a new taxon, Dinocarcinus 45 velauciensis n. gen. n. sp., referred to as Portunoidea sensu lato, a group of "true" crabs nowadays linked to marine systems. However, the faunal assemblage, the claw taphonomy and the carbonates Y/Ho signatures support their ancient freshwater/terrestrial ecology, making them the oldest reported continental brachyurans and extending the presence of crabs in freshwater environments by 40 Ma. Either as primary or as secondary freshwater crabs, the 50 occurrence of these portunoids in Velaux is an evidence for the independent colonizations of continental environments by multiple brachyuran clades over time, as early as the Campanian. 55 60 65

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Comparative experimental taphonomy of eight marine arthropods indicates distinct differences in preservation potential

Cited by 59 publications

References 126 publications

Crustaceans as hosts of parasites throughout the Phanerozoic

Crustaceans as hosts of parasites throughout the Phanerozoic

Evolution of crab eye structures and the utility of ommatidia morphology in resolving phylogeny

The oldest freshwater crabs: claws on dinosaur bones

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